Improvement in artificial stone



COATING OR PLASTIC.

HANS LEMON, JAMES A. CAMERON, AND HARTZELL HAINER, ()F MEMPHIS, TENNESSEE.

To all whom it may concern:

sulphate ot antnnonv. I 1e second part of our invention relates to half )art of silicate of soda and a Hall )arE water an'd 'a'IToweEl' to remain twen'ty-i'our Ho IMPROVEMENT IN ARTIFICIAL STONE.

Specification forming part of Letters Patent No.

December Be it known that we, HANS LEZ\ION,JA1IES A. CAMERON, and HARTZELL HAINER, all residing in the city of Memphis, county of Shelby and State of Tennessee, have invented a composition stone for window caps, sills, and other ornamental work in buildings, also blocks for sidewalks, hitching-posts, stepping-stones, and other devices that are now made of stone for huildin g purposes or otherwise, of which the following is a specification:

The first part of our invention relates to the ingredients that compose this stone, being four parts of clean sharp sand entirely free of aluminum, two parts cement one part dolomite limestone grountmlowdered,

163,386, dated May 18, 1875; application fihd sidewalks, when the walks are laid in a plastic state and allowed to nearly dry, they are washed first with half part silicate of soda and a half part water, applied warm, and allowed to stand twenty-four hours, and then washed in lime-water, and allowed to dry twenty-four hours, when they are again washed with a half part of silicate of soda and a half part water, as before.

Take four parts sharp clean sand, free from all aluminum matter; any cement now muse, one

part; dolomite limestone )owderedone part; owdered cIiaIk one pal-; l1 large one-halt uc or '-w od ashes ofiralipart, mixed t wrong 1 y together, and heated while dry; then mix this compound inte astitt' plastic state by adding heated silicate of one par cia onealt" part lithar 'e and a soda half part, and watenone- 51 t part, o half part hickory-wood ashes. 'IIiese ingre- Iie tamped and pressed into molds, so as to dients are to e ea cc, t loroughly mixed, and sifted togetherpreparatory to being worked into a stilt plastic state by adding silicate of soda and water in equal parts of each. This a so must e ieated, and to give this plastic mass any colorfs'ay, red, use oxide of iron. blue, ultramarine blue gray w ute zinet ust.

make a close-grained tlinty stone, and, after drgin for two or three days, to be placed in warm baths of a half part silicate soda and a half rart water, where they are to remain -\ven your IOLIIS; then allowed to dryin the ma' sun anl an; then placed in a bill'TfOi' lunewater. to remain twenty-tour hours; then uI- gray iron filings, orcopper-as-wnter, and black lowed to dry twenty-tour hours, when they the mode of filling our molds, as described in first part of specification, which is the tamping and pressing the same in molds, or if worked otherwise in a stilt plastic state, forming a solid stone freed from imperfections or blubbers, and also by this tamping and pressing to make a more solid liinty stone.

The third part of our invention relates to the mode of treating these stones, when fully set and dry, to a warm bath of onehalt wart waterand a halt )art rem to remain wen .your ours; t ion again to allow them to be exposed to the air and heat of the sun; then to place them again in a bath of lime-water when they are again exposed to the air and heat of the sun, when they are again placed in a warm bath of oneurs, when they are ready for use, after washing them with salt and water to remove the crystallization o e soc a. 'Vhen used 04 are again placed in a warm bath of a half )art silicate of soda and a ha t' par 0 wa er. hen removed trom this birth, they are in salt-water or brine to remove the soda fiom The face ol same, wIien they are ready for use.

We do not claim the invention of making artificial stone, or the making ofartilicial stone with sand, cement, and silicate of soda; but

What we do claim is Stone made of sharp sand, cement, dolomite limestone, powdered chalk, lithar 'e, hickorywood ashes, mixed with silicate of soda, and lime-water, when all these ingredients are used in combination, in the proportion hereinbefore stated, and the mode of treating the stone by warm baths of silicate of soda and lime-water alternately and washing in lime, substantially as and for the purposes described.

HANS LEMON. JAMES A. CAMERON. HARTZELL HAINER. Witnesses:

EUGENE LEHJIAN, W. R. SIMs.

L. s.] L. s] L. s]

PATENT ()FFICE. 

